RPT FROM A CFI OBSERVER REGARDING PRACTICE OF ACFT HOLDING ON RWY FOR A PERIOD OF TIME AT NON TWR ARPT ON A POSSIBLY ACTIVE RWY.

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THE CURRENT WX METAR WAS: WLD XX07Z 340 DEGS AT 10 KTS VISIBILITY 6 MI MIST OVCST 500 FT; 8 DEGS C/7 DEGS C ALTIMETER 29.72. WX 15 MINS PRIOR WAS OVCST 300 FT AND WIND 320 DEGS AT 8 KTS. THE PROB WAS THAT THE ACFT TAXIED FROM THE PARKING AREA TO JUST SHORT OF RWY 35 AT WLD. WHILE AT THIS LOCATION; THE ACFT WAS SITTING ON A 'POSSIBLY ACTIVE' RWY; RWY 31. THE ACFT FAILED TO STOP AT THE DEPICTED HOLD LINE (WHICH ALSO INCLUDES 2 'IFR HOLD' SIGNS; ONE ON EITHER SIDE OF THE TXWY; CLRLY VISIBLE) TO REMAIN CLR OF RWYS WHILE COMPLETING RUN-UPS AND RECEIVING IFR CLRNC. THE TWIN CESSNA REMAINED ON RWY 31; JUST SHORT OF RWY 35 FOR APPROX 10-15 MINS; THEN DEPARTED on RWY 35. IT IS UNKNOWN TO ME WHY SOMEONE WOULD INTENTIONALLY TAXI ACROSS A HOLD LINE WITHOUT BEING TOTALLY READY TO DEPART PROMPTLY. THIS IS A VERY HAZARDOUS HABIT; AND UNFORTUNATELY I'VE SEEN THE EXACT SAME THING HAPPEN SEVERAL TIMES AT THIS SAME LOCATION ON THE FIELD; AND I CANNOT FIGURE WHY IT IS HAPPENING. I HAVE BEEN ABLE TO OBSERVE THESE INCIDENTS FROM MY WORKPLACE; WHICH IS LOCATED ADJACENT TO THIS PART OF THE ARPT. I BELIEVE THAT SOME PLTS ARE CONFUSED ABOUT FLYING AT ARPTS (UNCTLED) WITH MULTIPLE RWYS. THEY MAY BE THINKING THAT EITHER THE 'LONGEST' OR THE ONE MOST SUITABLE WITH THE WINDS IS THE ONLY ONE THAT WOULD BE USED. WE NEED TO HEIGHTEN AWARENESS ON THESE TYPES OF ISSUES IN INITIAL AND RECURRENT TRAINING. I BELIEVE THAT YOU DO NOT CROSS A HOLD LINE UNLESS YOU ARE TOTALLY PREPARED TO DEPART. THIS PLT AND SOME OTHERS OBVIOUSLY DO NOT HAVE THAT SAME BELIEF. THIS PROB HAS TO BE LINKED EITHER TO POOR TRAINING AND REFRESHERS OR JUST PURELY TOO MUCH COMPLACENCY. POOR SITUATIONAL AWARENESS. LACK OF FAMILIARIZATION WITH ARPT MARKINGS. PAY ATTN.